body panel alignment problem

[JHS]

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There are shims that go under the small screws that hold the cowl onto the top of the f/wall. The cowl panels generally fit very poor, especially at the ends where it goes under the windshield reveal molding. There are triangular shaped, closed cell foam, wedges that are glued to the underside of the cowl - I'm not totally sure what they are for, but.....

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Went to the junk yard and found the donor Nova. Removed the cowl panel and was surprised to see the number of shims that were under the screws! It appeared that a bunch of shims had been glued together at the factory to create one really thick shim, does this sound correct? I put these shims under my cowl panel and it aligned pretty good. Just want to make sure that this sounds correct or did some back-yard mechanic jury-rig this Nova. Anyone got a pic of the cowl panel by the hood hinge, showing the shims?? Thanks.